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30-06-2025 16:56

Lydia Koelmans

Please can anyone tell me the species name of the

01-07-2025 23:37

Josep Torres Josep Torres

Hello.A Pleosporal symbiotic organism located and

30-06-2025 12:09

Edvin Johannesen Edvin Johannesen

This tiny, rather "rough" erumpent asco was found

30-06-2025 06:57

Ethan Crenson

Hi all, Another find by a friend yesterday in Bro

30-06-2025 19:05

ALAIN BOUVIER

Bonjour à toutes et à tousJe cherche à lire l'a

30-06-2025 14:45

Götz Palfner Götz Palfner

This is a quite common species on Nothofagus wood

25-06-2025 16:56

Philippe PELLICIER

Bonjour, pensez-vous que S. ceijpii soit le nom co

29-06-2025 18:11

Ethan Crenson

Hello all, A friend found this disco yesterday in

28-06-2025 17:10

Peter Welt Peter Welt

I'm looking for: RANALLI, M.E., GAMUNDÍ, I.J. 19

28-06-2025 16:00

Josep Torres Josep Torres

Hello.A tiny fungus shaped like globose black grai

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Hypoxylon on Carpinus?
Mirek Gryc, 30-03-2020 20:45
Hi.

I found two Hypoxylon collections growing on Carpinus yesterday. The shape of the sporocarps varies but I suspect it is the same species. So far, I've only microscoped the first one.
The keys contained in the work "New species of Hypoxylon from western Europe and Ethiopia" lead me to the Hypoxylon commutatum. I compared the features of my sporocarps to all species found on Carpinus, but none match mine.
Description for Hypoxylon commutatum is quite scanty but only in it I did not find any features that would exclude this species.
The reaction of porus in my collection was very capricious. Only a few ascus have a slight bluish discoloration of porus. Over 95% of ascus do not show reaction to iodine. In no mature ascus I have not observed a reaction.
Spores in my collection slightly larger than those listed on the page:
http://pyrenomycetes.free.fr/hypoxylon/html/Hypoxylon_commutatum.htm
In the original description, however, in "Pyrenomycetes germanici" they give slightly larger ones that perfectly match the size of the spores in my collection.
Perhaps I have not reached all species that occur on Carpinus so I am asking you for help.

Spores:

(10.9) 11.3 - 12.1 (12.5) × (4.8) 5 - 5.5 (6) µm
Q = (2) 2.1 - 2.3 (2.6) ; N = 15
Me = 11.7 × 5.3 µm ; Qe = 2.2

10.92 4.75
11.55 5.51
11.27 4.98
11.73 4.99
12.02 5.44
12.50 4.81
11.74 5.08
12.10 5.43
12.44 5.05
11.53 5.51
11.60 5.07
11.80 6.00
11.21 5.45
11.61 5.51
11.79 5.50

Thank you in advance.

Mirek
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Mirek Gryc, 30-03-2020 20:53
Re : Hypoxylon on Caprinus?
A second collection that I haven't microscoped yet. Also with Carpinus.
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